The Iran Nuclear Deal was the most important security agreement of this century, "not only of [Obama’s] presidency." Trump threw it away. He promised a “bigger, better deal” that he never delivered. This set us on the path to war. https://trib.al/YGwuJ07
When Did This War Really Start? When Trump Blew Up Obama’s Iran Deal

The 2016 JCPOA was real, and it was working. If Trump had stayed with it, there’d be no need—or excuse—for war today.

The New Republic